Guard for abrading or cutting tools.



S. W. SCOFIELD 6L M. W. MUEHLHAUSER. GUARD FOR ABHAlDlNG 0R CUTTING TooLs.

APPLICATION FILED MIG.20. |915. A

Patented Mar. 12, 1918.

2 SHEETS-SHEET I.

S. W. SCOT-'TELO & Nl. W. MUEHLHAUSER.

GUARD FOR- ABRAIDING 0R CUTTING TOOLS.

APPLICATION FILED AUG. 20. |915.

Patented Mar. 12, 1918.

2 SHEETS-SHEET 2.

SH W. SCOFIELD AND MRTIN`WM. MIJ'EHLHAU'SER, 0F CLEVELAND, OHIO.

GUARD FOB. ABRADING OR CUTTING TOOLS.

Specification of Letters Patent. Patented Mar. 12, 1918.

Application ledAugust 20, 1915. Serial ,Na 46,525.

herein explained and the best mode in whichv we have contemplated applying thatprinciple, so as to distinguish it from other inventions. i

Our invention relates to guards adapted to be placed upon'machinery against the abrading or cutting 'tools and which will prevent chips or metal or particles of the abrading wheels from causing injury by lodging in the eyes of the workman operating such tools.

The object of the invention is to provide a guard of this character which will be economical ofmanufacture and eicient in its operation. Y

The said invention consists of means hereinafter fully described andv particularly set forth in the claims.

The annexed drawings and the following description set forth in detailcertain means embodying our invention, the disclosed means, however, constituting but one of various mechanical forms in which the principle of the invention may be applied.

In said annexed drawln'gs:-A

Figure l represents a front elevation of our improved-guard detached from a machine. t

Fig. 2 represents a vertical section taken ipon a plane indicated by line II-II in 40 v ,Fig 3 represents a front elevation, upon a reduced scale, of an emery grinding wheel showing our improved guard attached thereto.

Fig. 4 represents a side elevation of such emery wheel with guard attached.'

Fig. 5 represents a perspective view of a fragmentary portion of an ordinary engine lathe showing my improved guard attached thereto.

Fig. 6 represents a section, upon an enlarged scale, of a detail part of the means for holding my improved guard in the arrangement shown in Fig. 5.

Fig. 7 represents a perspective view 'of an ordinary shaper showing Nour improved guard attached thereto.

The embodiment of our invention as illustrated in Fig. 1 comprises a sheet metal frame 1 having the sides and bottom turned to `form marginal seats 2 and a bottom receiving seat 3, into which may be slid from the top a thick sheet 4 of glass preferably provided with a reinforcing wire mesh 5,.

'thisv reinforcing' glass being an ordinary commercial product. A spring dog 6 is preferably formed in the upper portion of the sheet metal of the frame which holds the glass in place against inadvertent removal and lat the same timepermits same to be removed when desired, forreplacement or other purposes.

The upper e ge of the frame is provided with a hinge 7 whereby the guard may be secured to the hood 8 of the emery wheel, the upper member 9 of the hinge being suitably riveted or otherwise secured, as shown in Figs. 3 and 4. The hinge is fastened in a position in which/the guard extends downlwardly over the exposed portion 10 of the emery wheel and in a position in which it intersects any particles of emery flying upwardly, that is, it intersects in this posltion, the line of vision of the operator which passes to the point at which the tool is operating against the work or the device which l is being ground. The guard is elevated in thisposition during the actual operation of grinding, but when the grinding operation is completed, it may be swung upwardly into the position shown in dottedl lines in Fig. 4, for dressing the Wheel.

In Fig. 5 I have shownl the arrangement whereby our improved guard is applied to an ordinary engine lathe. In this arrangement a suitable upright standard 11 is secured, in any desired manner,'to the crossslide 12, and a bar 13 is secured thereto by means of a clamp 14, so that said bar 'may be adjusted vertically or longitudinally, as may be desired. Totheone end of the bar is secured the hinge 7 of the guard, -such `s ecuring being effected preferably by means of a thumb nut 15. The clamp 14 may be constructed by providing a splitmember 16, Fig. 6, adapted to receive the upright standard 11, a split member 17 adapted to relos of said clamping member, as shown, the x other end of said member 18 being provided with a thread and passing loosely through both parts of the clamping member 17, together with a threaded hand nut 19 engaging said other threaded end of the'member y18. -,It ,will thereforebe seen by means of this arrangement, turning the nut 19'will either loosen or clamp the two members 11 and 13, together.

The-guard rests normally in the position shown in Fig. 5 so as to be suspended against the inner end of the bar 13. In this position N1t intersects a line of vision passing through an ordinary shaper and planer,

the cutting portion ofv the tool 20, thus pre-4 ventingfchips from flying vinto the eyes of the operator.

In Fig. 7, the guard is shown applied to asuitable bracket-21 beingA lprovided whereby it may be suspended in a suitable position so as to prevent iying chipsfrom injuring the operator. l

In the .application of the device to both the latheand the Shaper, it will be seen that when .des1red, 1t may be swung out of the line of vision when the tool is not-operating, so as to permit ready adjustment of the tool or examination of the work.

In this manner it will be seen that an elective guard is provided which does not interfere with the vision of the work and the tool when'in operation thereon.

Having fully described our invention, what we claim and desire to secure by Letters' Patent is 1. A guard for abrading or cutting tools, comprisingthc combination of a sheet metal frame overturned at a plurality of its edges to form marginal seats; a sheet of transparent material adapted to it n said seats; and a resilient member formed insaid frame and adapted to bear against said transparentA sheet to hold the sameremovably in said 2. A guard for abrading or 'cutting tools, comprising the combination of a sheet metal frame formed at one end and along a portion of both side edges with overturned members creating marginal seats; a sheet otI transparent material adapted to it in said seats; and a spring d cg formed in the other end of said frame and adapted to bear against said transparent sheet.

Signedlby us, this 18th day of August, 15

, 'SHERMAN w soorIELD.

MARTIN WM. MUEHLHAUSER. 

